US3872193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing powdered superalloys
Assignee: GTE Sylvania Inc
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Filing: 1971-05-24
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Granted: 1975-03-18
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Expires: 1991-05-24
Abstract
Abstract A process produces the pre-alloyed superalloy powders having the constituents homogeneously dispersed throughout and of high purity by placing a shaped article of preselected metallic content in an induction furnace, melting the article by induction heating in a relatively short period of time, forming droplets of molten metal, subjecting the molten metal to a centrifugal force by a rotating disk, cooling the droplets into superalloy particles, collecting the metal particles and providing an inert gas having less than 1 ppm of oxygen, water and nitrogen throughout the foregoing steps.
Inventors
- 👤 James Thomas Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:40
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/06; B22F9/08; B22F9/10; B01; B01J; B01J2/00; B01J2/02; B01J2/04; B22F2999/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
98 words
A PROCESS SUITABLE FOR PRODUCING PREALLOYED SUPERALLOY POWDERS, SAID PROCESS COMPRISING CONDUCTING IN AN INERT ATMOSPHERE CONTAINING LESS THAN ABOUT 1 PART PER MILLION OF OXYGEN, WATER AND NITROGEN THE FOLLOWING PROCESSING STEPS, A. PLACING A SHAPED ARTICLE OF A SUPERALLOY HAVING A PRESELECTED METALLURGICAL CONTENT IN AN INDUCTION FURNACE, B. INDUCTION MELTING A PORTION OF SAID ARTICLE AT CONTROLLED RATE BY INDUCTION HEATING, C. FORMING DROPLETS OF MOLTEN METAL BY SUBJECTING THE MOLTEN METAL TO A CENTRIFUGAL FORCE BY A ROTATING DISC, D. COOLING SAID DROPLETS TO FORM SOLID PARTICLES OF SUPERALLOY, AND E. COLLETING SAID PARTICLES.
Claim 2
Dependent Claim
98 words
A PROCESS SUITABLE FOR PRODUCING PREALLOYED SUPERALLOY POWDERS, SAID PROCESS COMPRISING CONDUCTING IN AN INERT ATMOSPHERE CONTAINING LESS THAN ABOUT 1 PART PER MILLION OF OXYGEN, WATER AND NITROGEN THE FOLLOWING PROCESSING STEPS, A. PLACING A SHAPED ARTICLE OF A SUPERALLOY HAVING A PRESELECTED METALLURGICAL CONTENT IN AN INDUCTION FURNACE, B. INDUCTION MELTING A PORTION OF SAID ARTICLE AT CONTROLLED RATE BY INDUCTION HEATING, C. FORMING DROPLETS OF MOLTEN METAL BY SUBJECTING THE MOLTEN METAL TO A CENTRIFUGAL FORCE BY A ROTATING DISC, D. COOLING SAID DROPLETS TO FORM SOLID PARTICLES OF SUPERALLOY, AND E. COLLETING SAID PARTICLES.
Claim 3
Dependent Claim
12 words
A process according to claim 1 wherein said inert atmosphere is argon.
Claim 4
Dependent Claim
22 words
A process according to claim 1 wherein said atmosphere is a vacuum atmosphere at least about 5 X 10 4 Torr pressure.
Claim 5
Dependent Claim
30 words
A process according to claim 3 wherein said article is a bar of superalloy and is melted at the rate of between about 0.25 to about 1.6 inches per minute.
Claim 6
Dependent Claim
30 words
A process according to claim 4 wherein said particles are produced by dropping the molten metal on a disc rotating at from about 1500 to about 4000 revolutions per minute.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |